Hall Effect Sensors Littelfuse Hall Effect Sensors are semiconductor-based integrated circuit with Hall plates that respond to magnetic fields. Hall Effect devices provide digital or analog output signals that are used for proximity and continuous rotary or linear positioning. Hall Effect Sensors feature active circuitry, so they always draw a small amount of current. Digital Hall Effect Sensors are ideal for high-speed sensing applications such as washing machines. Analog Hall Effect Sensors are used in detecting dial position in appliance such as dishwashers.